From 3e5c270f95c67fef61fffc372a1cc8ef43ba1d61 Mon Sep 17 00:00:00 2001
From: andy840119 <andy840119@gmail.com>
Date: Sun, 24 Oct 2021 23:27:19 +0800
Subject: [PATCH] Add border property.

---
 .../Shaders/CustomizedShaderTestScene.cs      | 22 ++++++++++++++++++-
 .../Shaders/RepeatMovingBackgroundShader.cs   |  6 +++--
 .../Shaders/sh_RepeatMovingBackground.fs      |  5 +++--
 3 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/osu.Framework.Font.Tests/Visual/Shaders/CustomizedShaderTestScene.cs b/osu.Framework.Font.Tests/Visual/Shaders/CustomizedShaderTestScene.cs
index d290c59..d1cec3d 100644
--- a/osu.Framework.Font.Tests/Visual/Shaders/CustomizedShaderTestScene.cs
+++ b/osu.Framework.Font.Tests/Visual/Shaders/CustomizedShaderTestScene.cs
@@ -99,7 +99,7 @@ public void TestPixelShader(float x, float y)
         [TestCase("sample-texture", 10, 10)]
         [TestCase("sample-texture", 30, 30)]
         [TestCase("sample-texture", 5, 20)]
-        public void TestRepeatMovingBackgroundShader(string textureName, float width, float height)
+        public void TestRepeatMovingBackgroundShaderDisplaySize(string textureName, float width, float height)
         {
             AddStep("Apply shader", () =>
             {
@@ -113,5 +113,25 @@ public void TestRepeatMovingBackgroundShader(string textureName, float width, fl
                 };
             });
         }
+
+        [TestCase("sample-texture", 0, 0)]
+        [TestCase("sample-texture", 10, 10)]
+        [TestCase("sample-texture", 5, 20)]
+        [TestCase("sample-texture", 30, 30)]
+        public void TestRepeatMovingBackgroundShaderBorder(string textureName, float width, float height)
+        {
+            AddStep("Apply shader", () =>
+            {
+                ShaderContainer.Shaders = new[]
+                {
+                    GetShaderByType<RepeatMovingBackgroundShader>().With(s =>
+                    {
+                        s.Texture = textures.Get(textureName);
+                        s.TextureDisplaySize = new Vector2(30);
+                        s.TextureDisplayBorder = new Vector2(width, height);
+                    })
+                };
+            });
+        }
     }
 }
diff --git a/osu.Framework.Font/Graphics/Shaders/RepeatMovingBackgroundShader.cs b/osu.Framework.Font/Graphics/Shaders/RepeatMovingBackgroundShader.cs
index 1f26a02..b60741b 100644
--- a/osu.Framework.Font/Graphics/Shaders/RepeatMovingBackgroundShader.cs
+++ b/osu.Framework.Font/Graphics/Shaders/RepeatMovingBackgroundShader.cs
@@ -16,6 +16,8 @@ public class RepeatMovingBackgroundShader : InternalShader
 
         public Vector2 TextureDisplaySize { get; set; } = new Vector2(10);
 
+        public Vector2 TextureDisplayBorder { get; set; }
+
         public RepeatMovingBackgroundShader(IShader originShader)
             : base(originShader)
         {
@@ -43,8 +45,8 @@ public override void ApplyValue(FrameBuffer current)
             var textureDisplaySize = TextureDisplaySize;
             GetUniform<Vector2>("g_DisplaySize").UpdateValue(ref textureDisplaySize);
 
-            //var border = Border;
-            //GetUniform<Vector2>("g_Border").UpdateValue(ref border);
+            var textureDisplayBorder = TextureDisplayBorder;
+            GetUniform<Vector2>("g_DisplayBorder").UpdateValue(ref textureDisplayBorder);
         }
     }
 }
diff --git a/osu.Framework.Font/Resources/Shaders/sh_RepeatMovingBackground.fs b/osu.Framework.Font/Resources/Shaders/sh_RepeatMovingBackground.fs
index b4429d9..0fa8c2d 100644
--- a/osu.Framework.Font/Resources/Shaders/sh_RepeatMovingBackground.fs
+++ b/osu.Framework.Font/Resources/Shaders/sh_RepeatMovingBackground.fs
@@ -11,16 +11,17 @@ uniform lowp sampler2D g_RepeatSample;
 uniform vec2 g_RepeatSampleCoord;
 uniform vec2 g_RepeatSampleSize;
 uniform vec2 g_DisplaySize;
+uniform vec2 g_DisplayBorder;
 uniform vec2 g_Offset;
 
 void main(void) {
     // calculate how many times texture should be repeated.
-    vec2 repeat = g_TexSize / g_DisplaySize;
+    vec2 repeat = g_TexSize / (g_DisplaySize + g_DisplayBorder);
 
     // get the repeat texture cooldinate.
     float repeatTexCoordX = mod(v_TexCoord.x * repeat.x + g_Offset.x, 1);
     float repeatTexCoordY = mod(v_TexCoord.y * repeat.y + g_Offset.y, 1);
-    vec2 repeatTexCoord = vec2(repeatTexCoordX, repeatTexCoordY);
+    vec2 repeatTexCoord = vec2(repeatTexCoordX, repeatTexCoordY) / g_DisplaySize * (g_DisplaySize + g_DisplayBorder);
 
     // because repeat texture will be the size of 1024*1024, so should make a conversion to get the target area of the texture.
     vec2 fixedTexCoord = repeatTexCoord * g_RepeatSampleSize + g_RepeatSampleCoord;